【单选题】【消耗次数：1】
电子邮件的应用层协议是（ ）。
①
Ftp和Http
②
TCP和IP
③
Arp和Rapp
④
SMTP和POP3
参考答案：
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相关题目
【单选题】
在利用浏览器浏览网站时，通常在TCP /IP模型的应用层、传输层和网络层使用的协议是（ ）。
①
FTP、TCP和IP
②
HTTP、UDP和IP
③
HTTP、TCP和IP
④
HTTP、TCP和ICP
随机题目
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Under this ____ pressure some of the rocks
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intensive
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weighty
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intense
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bulky
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The patient was fully ____ during the operation.
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liberal
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sensible
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aware
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conscious
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He might have been killed ____ the timely arrival of the ambulance.
①
but for
②
except for
③
besides
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except
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You must be careful when ___ on the highway.
①
you driving
②
are driving
③
driving
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you were driving
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— We have to stop talking here. Listen, _____!
—Hurry up, or we’ ll be late.
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There goes the bell
②
There does the bell go
③
There the bell goes
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Goes the bell there
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Even if his letter ____ tomorrow, it ____ too late to do anything.
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will arrive...is
②
should arrive...were
③
arrives...will be
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arrives...would be
【单选题】
— The water changes into thick ice covering rivers and lakes
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—_____ in Urumqi and children go skating on it then.
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So is it
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So it does
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So it is
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【单选题】
You’ ll have to____ your wrongdoing one day.
①
answer for
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answer to
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ask for
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allow for
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Classification is a useful ____ to the organization of knowledge in any field.
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means
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approach
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mode
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manner
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We will be losing money this year unless that new
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works
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will be working
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